根据文本框输入的内容匹配gridpanel中的数据，查找到第一项就break

var searchButton = new Ext.Button( {
renderTo : 'businessUserQuery',
text : "<span style='font-size:12px'>查询</span>",
iconCls : 'addx',
autoHeight : true,
width : 60,

bodyStyle : 'padding: 5px',
handler : function() {
//标志位，查找到第一个，就退出遍历
    var flag = 0;
    var searchTxt = search.getValue();
    for(var i = 0; i < store.getCount();i++)
    {
    //用输入内容searchTxt创建正则表达式对象，忽略大小写。
            var re = new RegExp(searchTxt,"ig");
            var num = String(store.getAt(i).get("number"));
            //在字符串num中查找匹配。 
            var r = num.match(re);
    if(r != null)
    {
                               //找到匹配项就把这一行选中
    userGrid.getSelectionModel().selectRow(i);
    break;
    }
    }
}
});

var search = new Ext.form.TextField( {
renderTo : 'businessUserSearch',
Height : 40,
width : 120,
bodyStyle : 'padding: 5px;',
handler : function() {

}
});

var userData = new Array();
    var store = new Ext.data.ArrayStore({
        fields: [
            {
                name: 'number'
            }
        ]
    });
    store.loadData(userData);

    var cm = new Ext.grid.ColumnModel({
        columns:[
            userGrid_sm,
            {
                id:"number",
                header:"用户号码",
                width: 200,
                align:'center',
                dataIndex:"number",
                editor: new Ext.form.NumberField({
                allowBlank: false,
                minLength:1,
                maxLength:15
            })
            }]});

    var userGrid = new Ext.grid.EditorGridPanel({
        sm:userGrid_sm,
        cm:cm,
        height:380,
        width: 1081,
        frame: true,
        store:store
    });
userGrid.render('businessEditorGrid');